2010 GMC Acadia Owner's Manual - Page 225

Infotainment System The headphones may automatically turn off after four hours of continuous use. To adjust the volume on the headphones, use the volume control located on the right side. Infrared transmitters are located at the rear of the RSE overhead console. The headphones shut off automatically to save the battery power if the RSE system and RSA are shut off or if the headphones are out of range of the transmitters for more than three minutes. Moving too far forward or stepping out of the vehicle, can cause the headphones to lose the audio signal. For optimal audio performance, the headphones must be worn correctly. Headphones should be worn with the headband over the top of the head for best audio reception. The symbol L (Left) appears on the upper left side, above the ear pad and should be positioned on the left ear. The symbol R (Right) appears on the upper right side, above the ear pad and should be positioned on the right ear. Notice: Do not store the headphones in heat or direct sunlight. This could damage the headphones and repairs will not be covered by the warranty. Storage in extreme cold can weaken the batteries. Keep the headphones stored in a cool, dry place. If the foam ear pads attached to the headphones become worn or damaged, the pads can be replaced separately from the headphone set. See your dealer/retailer for more information. Headphones should be stored in the front floor console and not in the front seat back pocket. Headphone damage can occur when the second row seats are folded forward. Battery Replacement To change the batteries on the headphones: 7-37 1. Turn the screw to loosen the battery door located on the left side of the headphones. Slide the battery door open. 2. Replace the two batteries in the compartment. Make sure that they are installed correctly, using the diagram on the inside of the battery compartment. 3. Replace the battery door and tighten the door screw. If the headphones are to be stored for a long period of time, remove the batteries and keep them in a cool, dry place.